Improvement in roller for extracting- cockle from wheat



W. G. DOUGLAS.

Seed Separator Patented March 23, 1869.

Ma g i ine-sacs:

fiuited e-ea:

a/ @Bifm.

WILLIAM G. DOUGLAS, 01; W RRENTON, VIRGINIA.

' Letters Patent No. 88,019, dated March 23, 1869.

MROVEMENT IN ROLL ER .E'OR EXTRACTING- COOKLE PROM WHEAT.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern Be it knownsgth'at 1, WILLIAM G. DOUGLAS, of Warrenton, county of Fauquier, in the State of Virginia, have invented a new and useful Improvement in Rolls for Extracting Cockle from Wheat; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawing, making a part of this specification.

The nature of my invention consists in the use of cork-wood, forming rollers, and applied, in combination with hard ones, of wood, or other suitable material, or with each other, in pairs.

Many eiforts have been made heretofore, in graincleaning machines, to make rolls which possess the requisite qualities of elasticity, durability, and adhesiveness. To supply such want, is the object of my invention.

To enable others skilled in the art to make and use myinvention, Iw'ill proceed to describe its construction and operation. p

The drawing represents a part elevation and a part section of my roller, which is made up of cylindrical sections, A, of cork-wood, placedupon a shaft, B, which may be square, or of other suitable shape, to prevent any tendency to their turning upon it.

These sections are confined on the shaft between two jamming-nuts, O, fitted to screws, or threads, made upon or near each end of the shaft, inside of the journals D of same.

These nuts may be so formed as to serve as their own washers, or separate and distinct washers, a, may he used between the cork and the nuts.

By means of these nuts, the cork can easily be compressedinto a desirable degree of hardness, and the roller, by being placed in a lathe, can be smoothly dressed.

When found necessary, these operations canreadily be repeated.

The cork, in its natural state, is found to be rather too soft, or yielding. I

I can use cork in another manner, such as covering a wood, or other suitable roller, with staves of it, socured by some adhesive substance, or otherwise securely fastened.

The cork is found to act the same as other soft rollers, in carrying off the cockle, 860., thus freeing the grain of it.

,VVhen obliged to use a poor or very porous quality of cork, the surface of theroller may be improved, and made smooth, by covering it with, or filling the cavities with any gummy elastic substance, such as, glue, rubber, molasses, or combinations of such, and other equivalent substances.

In the cleaning-operation, the grain it to pass between my improved roller or rollers, or a harder one or ones, the two being in contact with each other, or as nearly so as may be found necessary. I think, however, to use the cork rollers in pairs, and have two or more sets, will be best, as 'in this way the grain, at

one operation, will have a better opportunity of being thoroughly cleansed. I can arrange brushes, as usual, to keep the rollers clean.

I am aware that cork rolls, per se, have been used in machines for wringing clothes, if not for other purposes. Such I do not claim. My application of a cork roll is a new one, for the purpose intended, and accomplishes a new result as a cork roll. Therefore, having explained my invention,

' What I claim as new, and desire to secure by Letters Patent of the United States, is-

In a grain-cleaning machine, cork rolls, to be arranged in pairs, or in juxtaposition with other suitable ones, as described, and for the purpose set forth.

Witnesses: WM. G. DOUGLAS.

' M. FLEToH'ER,

JNO. T. JAMns. 

